Device for cross beams of planers



(No Model.) 3 sheets-sheet 1. G. L. MARBLE.

GLAMPING DEVICE POB, GROSS BEAMS 0F PLANERS.A

No. 882,658. Patented May 8, 1888.

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(No Mo'del.) 3 Sheets-Sheet 2.

G. L. MARBLE.

GLAMPING DEVIGBPOR GROSS BEAMS OP PLANERS.

Patented May 8,1888'.

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065 ade INVENTOR. 6L.

5 WITNESSES.

M .Ettorneyl {No Model.) 3 Sheets-Sheet 3.

-G. L. MARBLE.

GLAMPING DEVICE P08 0808s BEAMS 0F PLANBRS.

No. 882,858. Patentedlvray 8 1888.v

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UNITED STATES PATENT Uri-ion GEORGE L. MARBLE, OF FIICHBURG.- MASSCHSETTS, ASSIGNOR TO THE FITCHBURG MACHINE \VORKS, OF SAME PLACE.

'CLAMPING DEVICE FOR CROSS-BEAMS OF PLANERS.

SPECIFICATION forming part of Letters Patent No. 382,653, lated ay 8, 1888. Application filed January 16, 1888. Serial No. S.L0,0:7. (Xo model.)

the same, reference being had to the accompanying drawings, making part of this specification, in which* Figure 1 is a perspective view of a metalplaning machine having my invention applied. Fig. 2 is a plan view of the cross-beam having the central section broken out and the uprights B B in section. Fig. 3 is a vertical sectional view on the liney yof Fig. 2, showing the binding devices in position to rigidly secure the cross-beam to the uprights. Fig. et is the same section with the binding devices loosened, so'

the cross-beam may be moved on the uprights. Fig. 5 is an elevation of the rear of the holding-plate, showing the binding devices in dotted lines..

Heretofore the tool-holding cross-beams of metal planers and similar machines have been held to the uprights or other sustaining devices by means of nuts and bolts, or screws,

which need to be loosened and tightened at each end ofthe cross-beam as changes of elevation are required. 'Ihis loosening and tightening of these nuts o1' screws involves considerable inconvenience and loss of time to the operative, and the object of my invention is to avoid their use and provide a means whereby lhecross-beam can be secured to its supports rigidly at a single movement and without the I work man moving Trom his working position at In order that those skilled in the art may make and use my invention, I will proceed to describe the exact manner in which Ihave carried it out.

In the said drawings, (see Fig. 1,) A is the bed of the planer, B B are the uprights on -which the cross-beam moves, and C is the cross-beam.

In all general respects the construction is after the well-known manner of constructing' plane-rs.

Below the recess a of the cross-beam, which provides for the transverse movement of the tool-holder. said cross-beam is bored at b to receive a cylindrical rod or bar, b', havingaprotruding end, to which is secured a handle or lever, d, for rotating or partially rotating the bar, fora purpose hereinafter set ont. the ends of the cross-beam and to its back are bolted two holding-plates, D D, which clasp the edges c e of the .uprights B B, so that the cross-beam can slide up and down the dressed face of the uprightswithout becoming detached 7 5 therefrom. The inner faces of the holdingplates D Dare cutaway, as seen atff, to form a recess to receive hardened frictional bindingplates g g g g', each end ofthe cross-beam being provided with a pair of such binding-plates. 8c

A diagonal recess, h, is made near each end in the cross-beam O, one end of said recess merging in the opening b, bored for rod b', and the upper or opposite end opening into the recess or housingf for binding plates or bars g g at a point lapping the contiguous ends of each pair of the binding-plates. In each recess his loosely placed a plunger or block, il i, adapted to be reciprocated by means of an eccentric,

ZZ, on the rod b', said block having its lower 9o s s, the inner ends of each screw bearing against the surface of one ofthe frictional bindingplates g g', and forming a fulcruin for each of Said binding-plates.

The binding or holding devices being in the position shown in Fig. 4, the operation is as ifo follows: The cross-beam is moved by the usual Y adjusting screws to any desired position on the uprights B B. The handle or lever d is turned and turns or partially rotates bar b', thereby,

Near 7o through the medium of eccentric Z Z, projecting the blocks or plu ngers i 'i toward and bearing against the contiguous ends of each pair ol' the hardened frictional binding-plates y g. This pressure on the inner or contiguous ends of each pair of the binding-plates g g' causes' them to rock or have a slight rotation on the ends of screws s s, whereby the opposite ends ofsaid plates g gare thrust laterally with great pressure against the rear faces, 'i i, of the uprights, and thereby rigidly secure the crossbeam to the uprights.

Iris obvious that the amount ofleverage with which the binding ends of plates gg can be forced against the uprights may be increased or diminished by the projection or withdrawal ofthe adjustingscrews s s, and thereby changing the relative positions of the fulcrums and applications of power.

In this description and accompanying drawings, for the purpose of illustration, I have shown my invention applied to the holding of a cross-beam of a planing-machine; but I do not confine myself to this application alone, as many different adaptations of my improved holding devices may be made without departing from the spirit of my invention.

I claimv l. The cross-bearn C. having t-he inclined recesses h, the` holding-plates D, provided with recesses, and the friction binding-plates seated therein. in combination with the operating-rod b', passing through said beam and provided with eccentricsl Z, and the loosely-seated plungers z' i in said inclined recesses actuated by said eccentrics to produce a pressure upon the adjacent ends of the binding-plates, substantially as herein described.-

2. The uprights B B and cross-beam C, having recesses ff, in combination with frictional binding-plates q g. plungers z' z', provided with ecrentrics ZI, rod b', and handle d, all con-p structed, arranged, and operated as set forth.`

eno. L. MARBLE.

WV i tn esses:

THORNTON K. WARE, GHAs. E. WARE, Jr. 

